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Micro et nano-antennes adaptées à la microscopie champ proche et à l'imagerie haute résolution

Abstract : This work consists of the study and the implementation of a near-field optical microscopy using annular nano-antennas to distinguish electric and magnetic components of the electromagnetic field, detected close to a sample.
We present near-field microscopy by advancing the importance of intrinsic characteristics of an illumination system, and also the role of nanocollector in interaction with electromagnetic field. The antennas are one of major stake in the art to detect electromagnetic fields, then we give antennas mapping in various scope frequencies and their respective applications for near-field microscopy. We explain the fabrication in four steps of a metallic annular nano-antenna with specific size at the extremity of an optical fiber.
After describing the illumination system and the experimental setup for the optical characterization, we present the study of a new typical probe: an annular nano-antenna at the extremity of fiber micro-axicon. By running the polychromatic polarized Bessel beam properties, we can access to collection properties due to the annular structure. We show that a nano-antenna can selectively collect the longitudinal component of the electric field from a radially polarized beam and the longitudinal component of the magnetic field from an azimuthally polarized beam. Therefore, we can expect a new analyze for electric or magnetic properties of samples in near-field scanning optical microscopy.
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https://tel.archives-ouvertes.fr/tel-00260097
Contributor : Audrey Fahys <>
Submitted on : Monday, March 3, 2008 - 11:28:45 AM
Last modification on : Thursday, November 12, 2020 - 9:42:05 AM
Long-term archiving on: : Thursday, May 20, 2010 - 11:49:59 PM

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  • HAL Id : tel-00260097, version 1

Citation

A. Fahys. Micro et nano-antennes adaptées à la microscopie champ proche et à l'imagerie haute résolution. Physique Atomique [physics.atom-ph]. Université de Franche-Comté, 2007. Français. ⟨tel-00260097⟩

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